Need suggestions deciding on an AR
I'm having trouble narrowing down my preferred spec.'s on an AR purchase - especially in light of current availability. Suggestions welcome:
Use: Home defense
Preferred calibers: 5.56 or 308 / 7.62 NATO ??
Manufacturer: I don't mind spending more on quality (i.e. DPMS, Rock River, Ruger, Daniel ??)
Twist: 1:7, 8, 9 ??
Availability: Besides locally, any suggested, trustworthy web sites and how long for shipping?
Ammo: Suggested trustworthy web sites for mail-order (not a whole lot locally anymore)